Pulp screening machine.



0. WANDEL.

PULP SCREENING MACHINE.;

APPLICATION FILED MAR.11.19,12,

1,036,390 Patented Aug. 20, 1912.

UNITED sTATEs PATENT oEEioE.

OTTO WANDEL, OF WALPOLE, MASSACHUSETTS. AS'SIGNOR T0 WANDEL SCREENMANUFACTURING COMPANY, A CORPORATION OF MASSACHUSETTS* PULP-SCREENINGMACHINE.

Specification of Letters Patent.

Application tiled March 1l, 1912.

Patented Aug. 20, .1%. serial no. 683,142.

To all whom t may concern:

Be it known that I, Orro VVANDEL, of Walpole, in the county of Norfolkand State of Massachusetts, have invented certain new and usefulImprovements in Pulp-Screening Machines, of which the following is aspecification, reference being had to theaccom panying drawings, formingpart thereof.

This invent-ion has reference to improvements in machines for screeningpulp and particularly to such machines in which the pnl 3 screens aremounted in vibratory arms or tlrames of the generalriature described inLetters Patent No. 955, 25, granted to me April 12, 1910.

The present invention has particular reference to the improved means forlimiting the movement of the arm or frame on which the pulp screen iscarried.

One object of the invention is to so construct the cooperating membersof a buffer device for limiting the vibrator-y movement of the screencarrying member that such device may be more conveniently located andaccessible than as heiietofore constructed and that the wearing parts ofsaid butler parts may be readily renewed.

Other objects of the inve tion will appear from the following descrption.

The invention consists in the novel construction of buffer device andits combination with the frame and arm of a pulp screeninv machine ofthe n ature described.

The rawingr represents L viefvv in elevation of parts of the frange thescreen carrying arm of a pulpI ycreening machine of the nature describedl'i my said patent, parts of the-butter being broken away to show thespindle extending therethrough.

By reference to my above mentioned patentI it will be seen that machinesof this nature comprise one or more cylindrical rotatable screens whichare carried by pivoted arms or frames which, in operation, are caused tovibrate bytmeans of a'carn or cams to effect the agitation ofthe pulptaken up bysaid screens to facilitate the passing of portions of 'saidpulp through the screens. In order to reduce the shock of such vibrationon the frame of the machine buffers have been located between said armsto yieldingly resist and limit the return movement of said arms towardtheir cooperating cam, As the buffers, so placed,

are inaccessible on account of the surround- Vthe buffer 19 may ingmechanism and, when including rubber Aor other elastic cushioningmaterial, are subject to deterioration from oil accumulating thereonfrom the bearings of such mechanism it has occurred to me to place suchbuffer devices at parts of the machine where such devices are readilyaccessible for inspection and renewal and, at the same time,

to improve the construction of such devices.

As shown in the a 1s drawings the frame similar to the frame 5 of saidpatent, and is similarly provided with the rocker arm 9 furnished withthe cam-face block 12 against which throw cam 16 acts intermittently tothrow outward the lower end of Said arm 9. Frame 5 has secured theretothe plate 6 having the stop 7 which plate 6 is located at a point onsaid frame toward which arm 9 is moved hyeam 1G. Arm 9 has a transversebore which is in alinment with the bore 8 of stop 7 and secured in saidbore of arm 9 is the spindle 10 having t-he shoulder' 11 and screwthreaded ends which are respectively provided with the nuts 13, 14 andwith thc lock nut 15. On said spindle 10 between the nut 14 and the stopG are the wear resisting plates 17 and 18 having located therebetweenthe rubber buffer 19 and, between plato 17 and nut 14,

the anvil or shock receiving member 20 which receives the blow from nut14 on the rct-ractive movement of arm 9 and its spindle 10 while theelastic buffer 19 cushions said shock. By means of such construction Iam enabled to plato this butler device in a position where its parts arealways acens- -sible for renenal. By simply removing the nuts 14 and 15the anvil Q0, plate 17 and be removed and the buffer, if worn, can bereplaced by a new buier and the plate 17 anvil 2O and nuts 14, 15replaced. When cam v1G acts against block 12 arm 9 is moved toward thestop 7 and spindle 10 slides in the bore of said stop While on thelreacting movement of arm 9 the nut 14 strikes the anvil 20 and the m act'of such blow is er 19 and is resisted by the stop 7.

Having thus described my invention, I claim as new and desire to secureby Letters Patent: l

In a pulpscre'ening machine, the combination with a frame having a stopfurnished. with a bore,.of an arin carried by said frame and having atransverse perforation, a spincushioned by the bufdie mounted in saidperforation and slid- 'to limit thel reverse movement of said spinablein the bore of said stop, an elastic bufdle by contact with said impactmember, fer on said spindle, wear plates mounted substantially asdescribed.

at the ends of said buffer, an impact receiv- OTTO WANDED. ing membermounted on said spindle and Witnesses:

bearing against one of said wear plates and VM. M. RINES,

a nut adjustable on said spindle and adapted W. M. PAINE.

